cwd10
Veteran
Location: PA, - U.S.A.
My Posts This: Topic Forum | Missing the point. Headroom is just that. It's only based on voltage. Yea, it can help but it's not necessary. I've been doing this a while. Never had any headroom issues with reserve power. Perhaps it's you who doesn't understand how ESC and electronics in particular work. I'll explain it as simply as I can. The ESC only uses the extra voltage when under spiked loads, but that's only part of the story. They also need current. There is a delay in the voltage ramp up, but little in the current ramp up. This means that there is still reserve power in the form of current instead of voltage, and it's more direct. Now, here's some basic electronics for ya: When energy is consumed, it is only really changing from one form of energy to another. When a motor turns, it is changing electrical energy to mechanical and thermal. When an ESC uses energy it is changing from electrical to another form of electrical AND thermal. Here's the rub. When the active electronics of the ESC are holding back the voltage on a varying load, the voltage has to get turned into some alternate form of energy, guess what that energy is. It's heat. Any time electrical energy is turned into heat, it is WASTED. The more voltage is held back, the more heat is generated. This is why many ESC's overheat at part throttle, but work fine at 100%. I know this has happened to many people, including myself. I guarantee, that ANY ESC follows these principals. It's just more evident on some, than others. When talking about efficiency, the way to transfer the MOST energy possible to the motor and not waste it as heat is to avoid buffering down the voltage, and let the available current do the work. Remember, we're talking about ACTIVE buffering here, not a static voltage divider. You can look these principals up in ANY electrical engineering book. I'm not making this stuff up.
Now I never said that everyone should always be running 100%. I only said that that's the most efficient. There is always a compromise, and everyone should run what they are comfortable with. I run 100% throttle on about 90% of my runs. I dail it down when conditions call for it. I have seen more than enough evidence to be conclusive on this. Believe me, it works. Try it yourself. As I said, I have had may many flights with that set-up, and never had a situation I couln't get out of. We're talking hundreds of flights here folks. For the record. Anybody that tells you that you SHOULD be running 85% or lower all the time does not understand basic electronics, let alone how an ESC really works.
FWIW, I apologize for hijacking this thread, and will no longer post here about this subject. If anybody want's to take this up any further, start another thread or PM me. OUT. |
